75 lines
2.4 KiB
Groff
75 lines
2.4 KiB
Groff
.TH PNG 5 "November 25, 2012"
|
|
.SH NAME
|
|
png \- Portable Network Graphics (PNG) format
|
|
.SH DESCRIPTION
|
|
PNG (Portable Network Graphics) is an extensible file format for the
|
|
lossless, portable, well-compressed storage of raster images. PNG provides
|
|
a patent-free replacement for GIF and can also replace many
|
|
common uses of TIFF. Indexed-color, grayscale, and truecolor images are
|
|
supported, plus an optional alpha channel. Sample depths range from
|
|
1 to 16 bits.
|
|
.br
|
|
|
|
PNG is designed to work well in online viewing applications, such as the
|
|
World Wide Web, so it is fully streamable with a progressive display
|
|
option. PNG is robust, providing both full file integrity checking and
|
|
fast, simple detection of common transmission errors. Also, PNG can store
|
|
gamma and chromaticity data for improved color matching on heterogeneous
|
|
platforms.
|
|
|
|
.SH "SEE ALSO"
|
|
.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
|
|
.LP
|
|
PNG specification (second edition), November 2003:
|
|
.IP
|
|
.br
|
|
<http://www.w3.org/TR/2003/REC-PNG-20031110/
|
|
PNG 1.2 specification, July 1999:
|
|
.IP
|
|
.br
|
|
http://www.libpng.org/pub/png
|
|
.LP
|
|
PNG 1.0 specification, October 1996:
|
|
.IP
|
|
.br
|
|
RFC 2083
|
|
.IP
|
|
.br
|
|
ftp://ds.internic.net/rfc/rfc2083.txt
|
|
.br
|
|
or (as a W3C Recommendation) at
|
|
.br
|
|
http://www.w3.org/TR/REC-png.html
|
|
.SH AUTHORS
|
|
This man page: Glenn Randers-Pehrson
|
|
.LP
|
|
Portable Network Graphics (PNG) Specification (Second Edition)
|
|
Information technology - Computer graphics and image processing -
|
|
Portable Network Graphics (PNG): Functional specification.
|
|
ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
|
|
.LP
|
|
Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
|
|
Glenn Randers-Pehrson and others (png-list).
|
|
.LP
|
|
Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
|
|
Thomas Boutell and others (png-list).
|
|
.LP
|
|
|
|
|
|
.SH COPYRIGHT NOTICE
|
|
.LP
|
|
This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h
|
|
for conditions of use and distribution.
|
|
.LP
|
|
The PNG Specification (Second Edition) is
|
|
Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
|
|
.LP
|
|
The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
|
|
See the specification for conditions of use and distribution.
|
|
.LP
|
|
The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
|
|
Technology. See the specification for conditions of use and distribution.
|
|
.LP
|
|
.\" end of man page
|
|
|